Gillian Anderson takes on the role of Jean Milburn, a sex therapist and mother of the main character, in the coming-of-age comedy-drama series, Sex Education. The show follows Otis, a socially awkward teenager who teams up with his classmates to set up an underground sex therapy clinic at their high school. Anderson's portrayal of Jean brings a mix of humor, warmth, and vulnerability to the character, making her a standout in the series.